Upper Cervical Instability

The atlas (C1) and axis (C2) are the most mobile joints in the body, but that mobility comes at a cost. When ligaments become lax (due to genetics like hEDS, trauma, or chronic inflammation), these bones shift.

Even a millimeter of misalignment can irritate the brainstem and compress the vagus nerve. The vagus nerve is your body's "brake pedal" for inflammation. When it's pinched, the brake lines are cut. You don't just get neck pain—you get systemic autonomic dysfunction, tachycardia, digestive paralysis, and profound anxiety.

Standard MRIs often miss this. You need upright, motion X-rays or cone-beam CTs to see the mechanical failure.